Gulp command not found after install

If you're using tcsh (which is my default shell on Mac OS X), you probably just need to type rehash into the shell just after the install completes:

npm install -g gulp

followed immediately by:

rehash

Otherwise, if this is your very first time installing gulp, your shell may not recognize that there's a new executable installed -- so you either need to start a new shell, or type rehash in the current shell.

(This is basically a one-time thing for each command you install globally.)

Turns out that npm was installed in the wrong directory so I had to change the “npm config prefix” by running this code:

npm config set prefix /usr/local

Then I reinstalled gulp globally (with the -g param) and it worked properly.

This article is where I found the solution: http://webbb.be/blog/command-not-found-node-npm

Not sure why the question was down-voted, but I had the same issue and following the blog post recommended solve the issue. One thing I should add is that in my case, once I ran:

npm config set prefix /usr/local

I confirmed the npm root -g was pointing to /usr/local/lib/node_modules/npm, but in order to install gulp in /usr/local/lib/node_modules, I had to use sudo:

sudo npm install gulp -g